How many grams in a tael? Full conversion table
Tael · mace · candareen · gram · ounce — every conversion | XAUAD · updated October 2026
LIVE · SNAPSHOT 2026-10-21 16:24 (UTC+8)
4,121.70
USD / oz (XAU/USD mid price)
In local currency886.70 / gram
FX rate USD/CNY6.6913
Bid / Ask4,121.70 / 4,122.35
Spread0.66 USD · 0.016%
At a jewellery shop the staff talk in taels and mace. Online, the international gold price is quoted per ounce. Mixing the two systems is the single most common reason people get a gold price calculation wrong. This page explains both systems side by side, with a live converter.
1. The short answer
One tael of gold = 37.5 grams
One mace = 3.75 grams · One candareen = 0.375 grams
One troy ounce = 31.1035 grams
One mace = 3.75 grams · One candareen = 0.375 grams
One troy ounce = 31.1035 grams
2. Taiwanese tael vs international units — where the 20% comes from
| Unit | Equals | Where it is used |
|---|---|---|
| 1 tael (台兩) | 37.5 g | Taiwanese jewellery shops |
| 1 mace (錢) | 3.75 g | Taiwanese jewellery shops |
| 1 candareen (分) | 0.375 g | Taiwanese jewellery shops |
| 1 gram | 1 g | Bank gold passbooks |
| 1 troy ounce | 31.1035 g | Spot gold, futures |
| 1 avoirdupois ounce | 28.3495 g | ⚠️ Never used for gold |
| 1 mainland liang (市兩) | 50 g | ⚠️ Different from the Taiwanese tael |
The most common mistake: treating one tael as 31.1 g (an ounce) or 50 g (a mainland liang). The first understates the weight by 17%, the second overstates it by 33%. On a one-tael purchase that is a difference of tens of thousands in local currency.
3. What does one tael cost? (live calculator)
USD per ounce (spot price)
USD to local currency rate
4. Conversion formulas
- Price per gram = (USD per ounce ÷ 31.1035) × FX rate
- Price per tael = price per gram × 37.5
- Price per mace = price per gram × 3.75
Example: gold at 4,180 USD/oz with an FX rate of 31.5 gives 4,234 per gram, so 158,775 per tael and 15,878 per mace.
5. Why the jewellery shop price differs from spot
A shop's board price is normally higher than the converted spot price, for three reasons:
- Fabrication cost (for jewellery) — a few hundred per mace
- Bid/ask spread — they sell to you above their buy-back price
- FX markup — shop currency conversion costs more than a bank's
So do not argue about price using the international spot quote — they are two different pricing systems. To compare, look at the price per mace or per gram.
6. Which unit should you use?
| How you invest | Quoted in |
|---|---|
| Jewellery, small bars | Mace / tael |
| Bank gold passbook | Grams |
| Gold ETF | Shares (tracks the ounce price) |
| Spot XAU/USD | Ounces (USD) |
Frequently asked
Q. How many grams is one tael of gold?
A. In the Taiwanese system one tael = 37.5 grams = 10 mace, and one mace = 3.75 grams.
Q. How many grams is one ounce of gold?
A. A troy ounce is 31.1035 grams — not the 28.3495 g avoirdupois ounce.
Q. Roughly how much is one tael worth?
A. At the 2026-10-21 price of 4,124.10 USD/oz and an FX rate of 32.6264, one tael (37.5 g) is about 162,226 in local currency. The shop's board price on the day governs the actual transaction.
Q. Why is a shop's tael different from the international ounce?
A. Two systems coexist: Taiwan uses the 37.5 g tael, the international market uses the 31.1035 g troy ounce. Always confirm the unit before converting.
Further reading: USD gold price vs local currency gold price: the formula and the premium
Related tools
- Gram / ounce / kilo converter
- Historical gold price lookup
- Gold profit and loss calculator
- Gold trading sessions
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This data is for information only and is not investment advice. Gold trading involves price risk.
© 2026 XAUAD · last updated 2026-10-19
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